4-Fluoromethamphetamine (4-FMA) is a stimulant drug related to methamphetamine and 4-fluoroamphetamine. Though little is known of the pharmacological properties of fluoro-methoxy-substituted amphetamines, 4-FMA has been identified as a component of designer drugs sold as “legal high” replacements for restricted substances. The hydrochloride formulation of this compound is intended for use as a standard for the forensic analysis of samples that may contain 4-FMA.